*,:before,:after{box-sizing:border-box;margin:0;padding:0}:root{--primary:#4f46e5;--primary-light:#e0e7ff;--text:#1e293b;--text-secondary:#64748b;--bg:#fff;--border:#e2e8f0;--bg-secondary:#f8fafc;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,Noto Sans SC,sans-serif;font-size:16px;line-height:1.5}body{margin:0}#root{flex-direction:column;min-height:100vh;display:flex}.app-layout{width:100%;max-width:960px;margin:0 auto;padding:0 24px}.nav{border-bottom:1px solid var(--border);background:var(--bg);z-index:10;align-items:center;gap:24px;padding:16px 24px;display:flex;position:sticky;top:0}.nav .logo{color:var(--primary);margin-right:auto;font-size:1.2rem;font-weight:700;text-decoration:none}.nav a{color:var(--text-secondary);border-radius:6px;padding:6px 12px;font-size:.9rem;font-weight:500;text-decoration:none;transition:background .2s,color .2s}.nav a:hover,.nav a.active{background:var(--primary-light);color:var(--primary)}.btn-primary{background:var(--primary);color:#fff;cursor:pointer;border:none;border-radius:8px;padding:10px 24px;font-size:.9rem;font-weight:600;transition:opacity .2s}.btn-primary:hover{opacity:.9}.btn-primary:disabled{opacity:.5;cursor:not-allowed}.btn-secondary{background:var(--bg-secondary);color:var(--text);border:1px solid var(--border);cursor:pointer;border-radius:8px;padding:10px 24px;font-size:.9rem;font-weight:500;transition:border-color .2s}.btn-secondary:hover{border-color:var(--primary)}.page-header{border-bottom:1px solid var(--border);margin-bottom:32px;padding:32px 0 20px}.page-header h1{color:var(--text);margin:0;font-size:1.6rem;font-weight:700}.spinner{color:var(--text-secondary);flex-direction:column;justify-content:center;align-items:center;gap:16px;padding:60px;display:flex}.spinner .loader{border:4px solid var(--border);border-top-color:var(--primary);border-radius:50%;width:40px;height:40px;animation:.8s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.file-upload{border:2px dashed var(--border);text-align:center;cursor:pointer;border-radius:12px;max-width:600px;margin:0 auto;padding:60px 40px;transition:border-color .2s,background .2s}.file-upload:hover,.file-upload.dragging{border-color:var(--primary);background:#f5f3ff}.file-upload p{color:var(--text-secondary);margin:8px 0}.file-upload .icon{font-size:2.5rem}.risk-badge{border-radius:12px;align-items:center;gap:4px;padding:2px 10px;font-size:.8rem;font-weight:600;display:inline-flex}.risk-badge.high{color:#c53030;background:#fde8e8}.risk-badge.medium{color:#b45309;background:#fef3c7}.risk-badge.low{color:#065f46;background:#d1fae5}.review-result{max-width:900px;margin:0 auto}.review-result .overall{border-radius:12px;align-items:center;gap:16px;margin-bottom:24px;padding:24px;display:flex}.review-result .overall.high{background:#fef2f2}.review-result .overall.medium{background:#fffbeb}.review-result .overall.low{background:#f0fdf4}.review-result .score{font-size:2.5rem;font-weight:700}.review-result .grade{font-size:1.4rem;font-weight:600}.clause-card{border:1px solid var(--border);border-radius:10px;margin-bottom:12px;padding:16px}.clause-card .clause-header{justify-content:space-between;align-items:center;margin-bottom:8px;display:flex}.clause-card .clause-text{background:var(--bg-secondary);color:var(--text-secondary);border-radius:6px;margin-bottom:8px;padding:10px 14px;font-size:.9rem}.clause-card .reason{color:#c53030;margin-bottom:4px;font-size:.85rem}.clause-card .suggestion{color:#065f46;font-size:.85rem}.chat-container{flex-direction:column;max-width:700px;height:calc(100vh - 180px);margin:0 auto;display:flex}.chat-messages{flex:1;padding:16px 0;overflow-y:auto}.chat-bubble{border-radius:12px;max-width:85%;margin-bottom:12px;padding:12px 16px;font-size:.9rem;line-height:1.6}.chat-bubble.assistant{background:#f1f5f9;border-bottom-left-radius:4px;margin-right:auto}.chat-bubble.user{background:var(--primary);color:#fff;border-bottom-right-radius:4px;margin-left:auto}.chat-input-wrap{border-top:1px solid var(--border);gap:8px;padding:16px 0;display:flex}.chat-input-wrap input{border:1px solid var(--border);border-radius:8px;outline:none;flex:1;padding:12px 16px;font-size:.95rem;transition:border-color .2s}.chat-input-wrap input:focus{border-color:var(--primary)}.chat-input-wrap input:disabled{opacity:.5}.contract-preview{border:1px solid var(--border);white-space:pre-wrap;background:#fff;border-radius:10px;max-height:500px;margin:16px 0;padding:32px;font-size:.9rem;line-height:1.8;overflow-y:auto}.history-list{max-width:700px;margin:0 auto}.history-item{border:1px solid var(--border);border-radius:10px;justify-content:space-between;align-items:center;margin-bottom:8px;padding:16px;transition:border-color .2s;display:flex}.history-item:hover{border-color:var(--primary)}.history-item .type-tag{background:var(--primary-light);color:var(--primary);border-radius:8px;padding:2px 8px;font-size:.75rem}